Mixing device



Oct 22, 1929- J. D. slDDl-:LEY 1,732,820

MIXING DEVICE Filed Feb. 2. 1927 2 sheets-*sheet 1 Oct. 22, 1929. J, D $|DDELEY 1,732,820

MIXING DEVICE Filed Feb. 2, 1927 2 Sheets-Sheet 2 lmatentedI Unt. 22, i929 Jl'UHN DVIENIPORT SIIDELEY, @y COVENTRY, 'ENGLAND llllllllllltil lElEVlCE Application illed February 2, i192?, lserial No. 165,403, and in tlreat britain March 23, 192B.

This invention relates to internal vcombustion engines having a central cranlrcase and stationary cylinders'arranged radially around it, andit has tor its object to provide an effective means for supplying mixture to the cylinders, preferably trom a single carburettor and at a slight pressure above atmospheric, although this is not essential. 'llhe chier diculty with induction systems of l@ this kind is to ensure equal distribution to the radially-arranged cylinders, and an even mixture.

rlhe invention relates to a system involving an annular channel with radial, or approximately radial, pipes leading to the cylinders, and a centrally arranged branch to which the Carburettor is connected.

lin the accompanying drawings, lligure 1 is an axial section of the induction system showing also a part of the engine crank chamber to which it is attached, and lligure 2 is an incomplete section on the line lll- II of Figure 1.

ln the construction illustrated, one end plate 2 of the crank chamber 3 is provided with an overhanging flange 4 which forms the outer wall of an annular chamber 5, and this dange is formed with elbows 6 which are connected by radial, or approximately radial,

l pipes 7 to the various cylinders.

` Bolted to this end plate '2 is. a cover 8 so shaped as to form the annular chamber- 5 from which the elbows G lead olf, This cover,

3 start-ing from the' outer edge, therefore .is so shaped as rst to approach at 9 the crank chamber end plate 2, leaving there a narrow annular gap at 9() of, say, half an inch from the end plate .2. It then sweeps outwards as at 10 away from the end plate 2 andtowards4 the axis 1O+O ofthe engine so as to form a conical chamber `11 communicatin p through the aforementioned gap with the annular o e 5. The 'cove'i` 8 is formed with a branch 1 ,preferably downwardly directed, to which the Carburettor 13 is attached. 'lhus there is formed between the end plate 2 and the cover 8 an outer annular chamber 5 communicating-through the gap with an .inner, roughly conical chamber 11, forming a .coaxiall with the fan spindle 14 and be supconnection between` the annular chamber 5 and the carburettor attachment. .lln the connecting chamber ll and along the axis @O of the engine is a revolvingv spindle 14 which may be driven directlyor 55 indirectly from the crankshaft 15, forming part of the latter in the present example, and this spindle carries :tan-blades 16 whichlie chiefly inthe largest part of the connect-v ing chamber 11, and are formed on a flange 6o or disc 17, the hub 18 of which is. fixed to the spindle lll by a locking device such Aas 19. 'l`he outer ends of these blades, however, project beyond the edge of the disc 17 and extend into, and as tar as possible t the section of, 6 the annular chamber 5. i

The innerends 160 of the alternate blades may be inclined at angles to the rotational axis differing from those of the adjacent blades to improve the low of air between them.

p Mixture is therefore drawn into the-engine cylinders from the carburettor 13 through the conicalconnecting chamber 11, annular chamber 5 and radial inlet pipe 7, and equal 75 distribution is effected by the particular arrangement and shape of the fan chamber and fan, which, in addition, prevents deposition of the fuel and thereby ensures a uniform mixture to all the cylinders.v If the fan is geared u it may. also cause the mixture to be supplie atapressure slightly above atmosp eric, but this is not essential.

If desired, a light spindle 20 may extend ported y a bearing 21 in the cover 8. If gearing is used for driving the fan,` this spindle 20 may serve for its support and/or for connection to 'accessories or other parts beyond thecover 8.

What I claim as my invention and 'desire to g secure by LettersPatent of the United States 1. "In a mixer for an induction system for a radial cylinder internal` combustlon engine, the combination of an annular chamber' provided with a narrow annular inlet. and outlet pipes spaced around the 'said chamber, a centrally arranged conical chamber cormnunioatf ing at its enlarged end with the annularcham- 10 chamber,

ber through the annular inlet, a carburator connected with the small end of said conical a centrally revolving'spindle carrying fan blades which lie chiefly in the annular cylinder and so constructed as to sweep out the whole of said annular chamber and the large end of the conical chamber.

2. The mixer as claimed in claim 1, having a continuation of the outer wall of the annular chamber contoured to form also the outer wall of the conical chamber, as well as to produce a narrow space between the two chambers, and to form a central branch for attachment to the Carburettor, substantially as set forth. c

In testimony whereof I have name to this specification.

JOHN DAVENPORT SIDDELEY.

signed my 

